Class 8 Light CBSE Questions & Answers

Class 8 · Light

This is Science Class 8 Light CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Danger signals are made red coloured because red light
  • A
    Do not scatter at all
  • B
    Viewed in absence of light
  • C
    Scatter least
    Correct
  • D
    Scatter most
2
Sky appear blue coloured during day because
  • A
    Sun light is made up of blue light only
  • B
    Sky is blue in colour
  • C
    Blue colour of light is visible in sunlight only
  • D
    Blue coloured light can be scattered by small particles
    Correct
3
A person want to obtain virtual image of same size, he should use a
  • A
    Concave mirror
  • B
    Convex mirror
  • C
    Any of these
  • D
    Plane mirror
    Correct
4
Which of the following phenomenon is based on persistence of vision principle?
  • A
    Colour blindness
  • B
    Myopia
  • C
    Cinematography
    Correct
  • D
    Hemophilia
5
A person is not able to view the nearby object clearly but can see far object distinctly. He is suffering from
  • A
    Hypermetropia
    Correct
  • B
    Myopia
  • C
    Astigmatism
  • D
    Presbyopia
6
The phenomenon of bending of rays of light when passes from one medium to another medium is called
  • A
    Dispersion of light
  • B
    Scattering of light
  • C
    Reflection of light
  • D
    Refraction of light
    Correct
7
Diverging mirror is used as mirror view mirror in vehicle as it
  • A
    Always form erect the magnified image
  • B
    Always form real and magnified image
  • C
    Always form real and diminished image
  • D
    Always form erect and diminished image
    Correct
8
Which type of mirror is used as
  • A
    Converging mirror
  • B
    Convex mirror
    Correct
  • C
    Concave mirror
  • D
    Plane mirror
9
Which type of mirror always form image behind the mirror?
  • A
    Plane mirror and convex mirror
    Correct
  • B
    Plane mirror and concave mirror
  • C
    Convex mirror and concave mirror
  • D
    Plane mirror only
10
Which of the following is an example of virtual image?
  • A
    Image formed by plane mirror
    Correct
  • B
    Image formed on retina of eyes
  • C
    Image formed pinhole camera
  • D
    Image formed on cinema screen
11
Diffused reflection of light
  • A
    Obey the laws of reflection
    Correct
  • B
    Do not obey the laws of reflection
  • C
    Occurs from plane surface like mirror
  • D
    May obey or may not obey laws of reflection
12
The elementary particles that defines light is the
  • A
    Proton
  • B
    Electron
  • C
    Neutron
  • D
    Photon
    Correct
13
Light consists of electromagnetic waves that
  • A
    Do not require material medium for propagation
    Correct
  • B
    Can propagate in air only
  • C
    Can propagate in rarer medium only
  • D
    Require material medium for propagation
14
The defects of eyes due absence of cones in retina is
  • A
    Night blindness
  • B
    Astigmatism
  • C
    Poor vision
  • D
    Colour blindness
    Correct
15
In figure given below, the image of a clock in plane mirror is shown the correct time is
Question 15 figure 1
  • A
    2:35 O
  • B
    9:25 O
    Correct
  • C
    2:25 O
  • D
    6:25 O